"The court may only grant leave if it is satisfied that -- (a) the result which the authority wish to achieve could not be achieved through the making of any order of a kind to which subsection (5) applies; and (b) there is reasonable cause to believe that if the court’s inherent jurisdiction is not exercised with respect to the child he is likely to suffer significant harm."
"This subsection applies to any order -- (a) made otherwise than in the exercise of the court’s inherent jurisdiction; and (b) which the local authority is entitled to apply for (assuming, in the case of any application which may only be made with leave, that leave is granted)"